I bought a new Lenovo E540 laptop plus extra RAM. I must confess that i am mechanically challenged. After watching videos on Youtube of dissembling the back case, it looked like a simple task of unscrew-remove screw-remove. I bought some jeweler's phillips head screwdriver and when the screws holding down the plastic case unscrew, they don't come out. As I continue turning, I hear a clicking sound. I don't want to damage the computer before I even turned it on.
Is there some trick to getting the screws out?